> ## Documentation Index > Fetch the complete documentation index at: https://evolink.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Grok Imagine 1.5 Lite Video > - Grok Imagine 1.5 Lite (grok-imagine-video-1.5-lite) is the lower-priced tier of Grok Imagine 1.5: text-to-video and image-to-video under one model name - There is no mode parameter: the number of entries in `image_urls` selects the mode — `0` = text-to-video, `1` = image-to-video (used as the first frame). Reference images (2 or more) are not supported - `1080p` output is upscaled from 720p and billed at a higher per-second rate - Asynchronous processing mode, use the returned task ID to [query](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly ## OpenAPI ````yaml en/api-manual/video-series/grok/grok-imagine-video-1.5-lite.json POST /v1/videos/generations openapi: 3.1.0 info: title: grok-imagine-video-1.5-lite Interface description: >- Use Grok Imagine 1.5 Lite for lower-priced text-to-video and image-to-video generation license: name: MIT version: 1.0.0 servers: - url: https://api.evolink.ai description: Production environment security: - bearerAuth: [] paths: /v1/videos/generations: post: tags: - Video Generation summary: grok-imagine-video-1.5-lite Interface description: >- - Grok Imagine 1.5 Lite (grok-imagine-video-1.5-lite) is the lower-priced tier of Grok Imagine 1.5: text-to-video and image-to-video under one model name - There is no mode parameter: the number of entries in `image_urls` selects the mode — `0` = text-to-video, `1` = image-to-video (used as the first frame). Reference images (2 or more) are not supported - `1080p` output is upscaled from 720p and billed at a higher per-second rate - Asynchronous processing mode, use the returned task ID to [query](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly operationId: createGrokImagineVideo15LiteGeneration requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/GrokImagineVideo15LiteRequest' examples: text_to_video: summary: Text to Video (no image) value: model: grok-imagine-video-1.5-lite prompt: >- A neon-lit street at night, slow dolly forward through the rain duration: 6 quality: 480p aspect_ratio: '16:9' image_to_video: summary: Image to Video (1 image) value: model: grok-imagine-video-1.5-lite prompt: The person starts dancing image_urls: - >- https://cdn.evolink.ai/Model-Example/GrokImagine1.5/generated-image.png duration: 6 quality: 480p responses: '200': description: Video task created successfully content: application/json: schema: $ref: '#/components/schemas/VideoGenerationResponse' '400': description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: invalid_request message: Invalid request parameters type: invalid_request_error '401': description: Unauthenticated, invalid or expired token content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: unauthorized message: Invalid or expired token type: authentication_error '402': description: Insufficient quota, recharge required content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: insufficient_quota message: Insufficient quota. Please top up your account. type: insufficient_quota '403': description: Access denied content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: model_access_denied message: >- Token does not have access to model: grok-imagine-video-1.5-lite type: invalid_request_error '429': description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: rate_limit_exceeded message: Too many requests, please try again later type: rate_limit_error '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: internal_error message: Internal server error type: api_error components: schemas: GrokImagineVideo15LiteRequest: type: object required: - model - prompt properties: model: type: string description: Model name enum: - grok-imagine-video-1.5-lite default: grok-imagine-video-1.5-lite example: grok-imagine-video-1.5-lite prompt: type: string description: >- Video description prompt (required, cannot be empty) **EvoLink platform length limit:** Up to `2000` tokens (counted with the cl100k tokenizer, so CJK prompts hit the cap at far fewer characters than Latin ones). The platform also enforces a limit of 60000 UTF-8 bytes. example: The person starts dancing image_urls: type: array items: type: string format: uri description: >- Input image URL (optional). One image switches the request to image-to-video. **Mode selection:** - `0` images (omit the field): text-to-video, no image charge - `1` image: image-to-video, used as the first frame; input images are billed separately (see the [pricing section](https://evolink.ai/grok-imagine-video-1-5-lite#pricing)) - `2` or more images are rejected — reference-to-video is not supported on Lite **Requirements:** - Playground local uploads: up to `10MiB` (10485760 bytes) per image. Image URLs sent directly to the API are validated upstream and do not use this local upload check. - Supported formats: JPEG, PNG, WebP minItems: 0 maxItems: 1 example: - https://example.com/image.jpg duration: type: integer description: Video duration (seconds), any integer between `1` and `15` seconds minimum: 1 maximum: 15 default: 6 example: 6 quality: type: string description: >- Video resolution, default is `480p` **Description:** - `480p`: Standard definition (default) - `720p`: High definition - `1080p`: Upscaled from 720p, billed at a higher per-second rate See the [pricing section](https://evolink.ai/grok-imagine-video-1-5-lite#pricing) for the per-resolution rates. enum: - 480p - 720p - 1080p default: 480p example: 480p aspect_ratio: type: string description: >- Output aspect ratio, default is `auto` **Applies to:** text-to-video (`0` images). With an input image the output follows that image's dimensions and this parameter is ignored. **Description:** - `auto`: No ratio is sent upstream and the upstream channel decides the framing (text-to-video currently renders 16:9); this is the default value - `16:9`: Landscape - `9:16`: Portrait - `1:1`: Square - `4:3`: Landscape, classic TV ratio - `3:4`: Portrait, classic TV ratio - `3:2`: Landscape, classic photo ratio - `2:3`: Portrait, classic photo ratio enum: - auto - '16:9' - '9:16' - '1:1' - '4:3' - '3:4' - '3:2' - '2:3' default: auto example: '16:9' callback_url: type: string description: >- HTTPS callback URL after task completion **Callback Timing:** - Triggered when task is completed, failed, or cancelled **Security Restrictions:** - Only HTTPS protocol supported - Callback to internal IPs prohibited (127.0.0.1, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.) - URL length must not exceed `2048` UTF-8 bytes **Callback Mechanism:** - Timeout: `10` seconds - Max `3` retries on failure (after `1`/`2`/`4` seconds) - The callback request body uses the task query API response structure - 2xx status code = success, others trigger retry format: uri example: https://your-domain.com/webhooks/video-task-completed VideoGenerationResponse: type: object properties: created: type: integer description: Task creation timestamp example: 1757169743 id: type: string description: Task ID example: task-unified-1757169743-7cvnl5zw model: type: string description: Actual model name used example: grok-imagine-video-1.5-lite object: type: string enum: - video.generation.task description: Specific task type progress: type: integer description: Task progress percentage (0-100) minimum: 0 maximum: 100 example: 0 status: type: string description: Task status enum: - pending - processing - completed - failed example: pending task_info: $ref: '#/components/schemas/VideoTaskInfo' description: Video task detailed information type: type: string enum: - text - image - audio - video description: Task output type example: video usage: $ref: '#/components/schemas/Usage' description: Usage and billing information ErrorResponse: type: object properties: error: type: object properties: code: type: string description: Error code identifier message: type: string description: Error description type: type: string description: Error type VideoTaskInfo: type: object properties: can_cancel: type: boolean description: Whether the task can be cancelled example: false estimated_time: type: integer description: Estimated completion time (seconds) minimum: 0 example: 120 video_duration: type: integer description: Video duration (seconds) example: 6 Usage: type: object description: Usage and billing information properties: billing_rule: type: string description: Billing rule enum: - per_call - per_token - per_second example: per_second credits_reserved: type: number description: Estimated credits consumed minimum: 0 example: 5.712 user_group: type: string description: User group category example: default securitySchemes: bearerAuth: type: http scheme: bearer description: >- ##All APIs require Bearer Token authentication## **Get API Key:** Visit [API Key Management Page](https://evolink.ai/dashboard/keys) to get your API Key **Add to request header:** ``` Authorization: Bearer YOUR_API_KEY ``` ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.